In what type of change is matter not destroyed? a. physical only b. chemical only c. physical and chemical

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

Which of the following molecules is polar? c3h7oh c2h5cooh